#!/usr/bin/env python3

import sys, zlib

fp = open(sys.argv[1], 'rb')
buffer = fp.read()
fp.close()

header = int.from_bytes(buffer[0:2], 'big')

if header == 0x1172:
    # GE
    buffer = zlib.decompress(buffer[2:], wbits=-15)
elif header == 0x1173:
    # PD
    buffer = zlib.decompress(buffer[5:], wbits=-15)
else:
    sys.stderr.write("Not an 0x1172 or 0x1173 compressed file\n");
    sys.stderr.write("Got bytes 0x%04x\n" % header);
    exit(1)

sys.stdout.buffer.write(buffer)
